Apparatus for making closed vessels from pulp.



No. 7||,|s5.

F. B. HowAnn. l APPARATUS FR MAKING CLOSED VESSELS FROM PULP.

(Appicatin ld Jan. 16, 1902.)

Patented oet. I4, |9112.

(No Model.)

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UNTTED STATES PATENT OEEIcE.

FRANK B. HOWARD, OF NEV YORK, N. Y., ASSIGNOR TO LAFLIN da RAND POVDERCOMPANY, OF NE YORK, N. Y., A CORPORATION OF NEW YORK. i

APPARATUS FOR MAKING CLOSED VESSELS FR'OM PULP.

SPECIFICATION forming' part of Letters Patent No. 711,165, dated October14, 1902.

Application iiled January 16, 1902. Serial No. 90.02B. (No model.)

To @ZZ whom, it may concern:

Be it known that I, FRANK B. HOWARD, a citizen of the UnitedStates, anda resident of the borough of Manhattan, in the city and State of NewYork, have invented a new and useful Apparatus for Making Closed Vesselsfrom Pulp, of which the following is a specification.

My invention relates to apparatus for maklo ing closed vessels frompulp, with the object in view of providing simple and effective meansfor expediting the manufacture of such articles without joint or seam.

My present invention relates more particularly to apparatus for carryingout what I am pleased to call the vacuum process, in which the pulp isforced toward the wall of the mold by internal atmospheric pressure asthe pressure is removed from the exterior zo wall of the mold by meansof some suitable vacuum applianee-as, for example, an exhaust-pump.

A practical embodiment of my invention is represented in theaccompanying drawings,

in which- Figure l is a view of the apparatus in longitudinal section,showing the position of the condensed pulp around the margin of the moldto form the wall of the closed vessel, and

3o Fig. 2 is a transverse central section of the same.

The body of the mold is composed of longitudinalsections--in thepresentinstance three longitudinal sections-each forming a third of the body,and these sections are denoted by a, b, and c. They are each formedhollow, the interior space of the section a being denoted by a', that ofh by b', and that of c by c. The inner wall of each section is providedwith manifold perforations CZ, through which the spaces a', ZJ', and c'communicate with the interior of the mold. The spaces a b c alsocommunicate with one another at the meeting edges of the sections, andthe space b is connected, by means of a pipe e, with a vacuum applianceof any well-known or approved form-such, for example, as anexhaust-pump. (Not shown.) The pipeeextends into the hollow through atrunnion f,

projecting from the mold-section b and hav- 5o ing a rotary movement ina bearing g, fixed to a support 7L. The trunnion f is conveniently heldin position by means of a setscrew i, which extends through the bearingg into an annular groovej, formed in the periphery of the trunnion f.

From the above it follows that when the exhaust is applied through thepipe e to the interior of the section b it will also aect the sections aand c, which are in communication with the section b.

The several sections a, b, and c are held in assembled adjustment bymeans of heads 7.a andV Z, each provided with a shallow recess, that inthe head 7c being denoted by Za' and 65 that in the head Z by Z', forthe purpose of receiving the opposite ends of the assembled sections a,b, and c when the heads are drawn toward each other. The heads arehinged at m to the section Z9 of the mold, and a rod fn, 7o hinged tothe section-head Z at n and arranged to swing at its free end into anopen slot k2 in the head 7c, has its screw-threaded free end providedwith a thumb-nut o for the purpose of forcing the heads toward eachother to lock the parts in assembled adjustment and for releasing therod n to permit the heads to be swung apart when it is desired to removethe completed article.

The heads 7o and Z, like the side sections of 8o the mold, are madehollow, the space within the head Zt being denoted by k3 and that withinthe head Z by Z2. The inner walls of the head, like the inner sides ofthe walls of the mold, are also perforated in order to establishcommunication between the spaces or chambers k3 or Z2 and the interiorof the mold. These spaces 7c3 and Z2 are also in communication throughpipes p and 1J with the vacuum appliance with which the pipe e eommu- 9onicates, so that when the said vacuum appliance is operated it willsimultaneously tend to produce a vacuum in both the heads, as well asthe body, of the mold.

The head 7c is provided in the present in- 95 stance centrally with anopening 7a4 for the reception of a plug q, the latter being projectedinwardly from the head 7c a sufficient distance (the thickness of theWall of the vesplug r', seated Within the plug q, the said vent servingto supply the air-pressure to the interior of the mold when the vacuumappliance is in operation.

The entire interior of the mold is covered with a Wire-gauze 3.

The operation is as follows: The mold having been turned into positionwith its head 7c uppermost,` as shown in Fig. l, the plug q is removedand the mold is supplied With its charge of pulp in a free-flowing stateof suspension. inserted in position and the vacuum appliance set inoperation to produce a vacuum Within the body and heads of the mold.This Will cause a flow of the liquid pulp toward all of the walls of themold and will cause the pulp itself to be deposited under atmosphericpressure, While the Water escapes through the perforations in the moldand through the pipes e, p, and p. When the pulp has been deposited to asufficient extent to form the Wall of the Vessel, the vacuum may berelieved and the mold turned in a position with its head lo downward topermit the removal of anyremaining suspended pulp, and the mold may thenbe opened and the vessel removed for drying. What I claim is- The plug,with its vent r, is then.

l. An apparatus for manufacturing vessels through manifold perforationsand means for placing a vacuum appliance in communication with theinteriors of the hollow Walls of the mold for inducing a deposit of thepulp on the interior of the mold, substantially as set forth.

2. Apparatus for forming closed vessels from pulp comprising a lnoldhaving its body and heads formed hollow, the interior of said hollowheads and body being in communication with the interior of the moldthrough manifold perforations, a vent extending from the exterior to theinterior of the mold the said mold being mounted to rock on its supportand means for placing a vacuum appliance in communication With theinterior heads and body of the mold for inducing the deposit of the pulpon the interior of the mold, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two Witnesses, this 2d day of .Iauuary, 1902.A

FRANK B. HOWARD.

Witnesses:

FREDK. HAYNES, C. S. SUNDGREN.

